shurk | 369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539

General

Target

369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe
Size

1.9MB
MD5

31d419dcf1a407ca78a912fec4369155
SHA1

148931fc3308f19f113500932f0f50ea23bbf83d
SHA256

369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539
SHA512

aa844c1b84c83e29f6dbe281a08a8bd0af1587a7c4db26ba36bae1f00947da99afaeb7ccb967e5fa3f7f0d0a24bd8bbc9636385ac5f32de238dfd3a519b8bf98

Score

10^/10

shurk evasion infostealer spyware stealer trojan

Malware Config

Signatures

Shurk
Shurk is an infostealer, written in C++ which appeared in 2021.
infostealer shurk

Shurk Stealer Payload 1 IoCs

resource	yara_rule
behavioral1/memory/596-76-0x0000000000151000-0x0000000000196000-memory.dmp	shurk_stealer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Executes dropped EXE 2 IoCs

pid	Process
956	Hack.sfx.exe
596	Hack.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Hack.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Hack.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Wine	Hack.exe

Loads dropped DLL 4 IoCs

pid	Process
1048	cmd.exe
956	Hack.sfx.exe
956	Hack.sfx.exe
956	Hack.sfx.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Hack.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
596	Hack.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
596	Hack.exe
596	Hack.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 876	1568	369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe	27
PID 1568 wrote to memory of 876	1568	369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe	27
PID 1568 wrote to memory of 876	1568	369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe	27
PID 1568 wrote to memory of 876	1568	369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe	27
PID 876 wrote to memory of 1048	876	WScript.exe	28
PID 876 wrote to memory of 1048	876	WScript.exe	28
PID 876 wrote to memory of 1048	876	WScript.exe	28
PID 876 wrote to memory of 1048	876	WScript.exe	28
PID 1048 wrote to memory of 956	1048	cmd.exe	30
PID 1048 wrote to memory of 956	1048	cmd.exe	30
PID 1048 wrote to memory of 956	1048	cmd.exe	30
PID 1048 wrote to memory of 956	1048	cmd.exe	30
PID 956 wrote to memory of 596	956	Hack.sfx.exe	31
PID 956 wrote to memory of 596	956	Hack.sfx.exe	31
PID 956 wrote to memory of 596	956	Hack.sfx.exe	31
PID 956 wrote to memory of 596	956	Hack.sfx.exe	31

C:\Users\Admin\AppData\Local\Temp\369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe
"C:\Users\Admin\AppData\Local\Temp\369b837d2a43020353233d28b132827efd0fc311b3b56f25aa1b9ba5b209a539.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\vbs.vbs"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:876
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c bat.bat
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1048
  - - C:\Users\Admin\AppData\Local\Temp\Hack.sfx.exe
      Hack.sfx.exe -pDSBFISDHFUOHSDUOFHUO182734198276491KHASCFGBAJJHJDFGA -dC:\Users\Admin\AppData\Local\Temp
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:956
    - - C:\Users\Admin\AppData\Local\Temp\Hack.exe
        
        "C:\Users\Admin\AppData\Local\Temp\Hack.exe"
        5⤵
        Executes dropped EXE
        Checks BIOS information in registry
        Identifies Wine through registry keys
        Checks whether UAC is enabled
        Suspicious use of NtSetInformationThreadHideFromDebugger
        Suspicious behavior: EnumeratesProcesses
        
        PID:596

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/596-73-0x00000000005C0000-0x00000000005C1000-memory.dmp

Filesize
4KB

Download
memory/596-83-0x0000000000870000-0x0000000000871000-memory.dmp

Filesize
4KB

Download
memory/596-70-0x00000000005D0000-0x00000000005D1000-memory.dmp

Filesize
4KB

Download
memory/596-71-0x0000000000860000-0x0000000000861000-memory.dmp

Filesize
4KB

Download
memory/596-68-0x0000000077330000-0x0000000077332000-memory.dmp

Filesize
8KB

Download
memory/596-72-0x00000000007B0000-0x00000000007B1000-memory.dmp

Filesize
4KB

Download
memory/596-90-0x0000000000790000-0x0000000000791000-memory.dmp

Filesize
4KB

Download
memory/596-74-0x00000000006F0000-0x00000000006F1000-memory.dmp

Filesize
4KB

Download
memory/596-75-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/596-77-0x0000000000760000-0x0000000000761000-memory.dmp

Filesize
4KB

Download
memory/596-76-0x0000000000151000-0x0000000000196000-memory.dmp

Filesize
276KB

Download
memory/596-78-0x00000000007A0000-0x00000000007A1000-memory.dmp

Filesize
4KB

Download
memory/596-79-0x0000000000770000-0x0000000000771000-memory.dmp

Filesize
4KB

Download
memory/596-81-0x00000000007C0000-0x00000000007C1000-memory.dmp

Filesize
4KB

Download
memory/596-80-0x0000000000780000-0x0000000000781000-memory.dmp

Filesize
4KB

Download
memory/596-82-0x0000000000730000-0x0000000000731000-memory.dmp

Filesize
4KB

Download
memory/596-69-0x00000000005E0000-0x00000000005E1000-memory.dmp

Filesize
4KB

Download
memory/596-84-0x0000000000880000-0x0000000000881000-memory.dmp

Filesize
4KB

Download
memory/596-85-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/596-86-0x0000000000750000-0x0000000000751000-memory.dmp

Filesize
4KB

Download
memory/596-87-0x0000000000700000-0x0000000000701000-memory.dmp

Filesize
4KB

Download
memory/596-88-0x0000000000720000-0x0000000000722000-memory.dmp

Filesize
8KB

Download
memory/596-89-0x0000000000740000-0x0000000000741000-memory.dmp

Filesize
4KB

Download
memory/1568-54-0x0000000075B51000-0x0000000075B53000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads